[GRASSLIST:4351] Grass57 Vector attributes
mholzmann at iaks.de
Wed Sep 15 07:36:30 EDT 2004
I want to reach the following:
load Shapefiles into a Postgis DB, with Grass 57 the access to the
attributes and finally add columns or/and Attribute tables.
so far I reached the following:
- with v.in.ogr I `ve imported the Shapefile with the states of Germany to
grass57. The Shape-dbf file was automatically imported and in the folder of
the location a Grass57-dbf file was created, which has immediately a DB
connection with the Grass vector map. With v.db.connect I can examine that.
Vector map <state1> is connected by: field <1> table
<state1> in database </home/mholzmann/grassdata/deutschland/vtest/dbf/>
through driver <dbf> with key <cat>
-then I export with v.out.ogr the data into the Postgis-DB. A table in the
Postgis-DB with the following columns is put on: oid, ogc_fid, wkb_geometry,
landnr, name, ID cat. All Attribute was thus written into the table.
-with v.external now I make a Postgis-DB connection with the Layer state1.
The geometry data are o.k. but the attributes doesn`t appear. The result of
a query results in :
Cannot open select cursor:`select*from
state1 where FID=69` on database`PG:localhost....,
-with an query with v.db.connect the following appears:
Vector map<postgis_state> is connected by: field <1> table <state1> in
<PG:host=localhost user=postgres dbname=db2> through driver <ogr> with
- How can I get access to the attributes in the table?
- Who can give me a tip how the attribute management works in Grass57 and
Postgis_DB, and with commands are needed
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